Recording medium, recording method, recording apparatus, and reproduction method

ABSTRACT

A recording medium, comprising a lead-in area, a data recording area that is formed on an outer periphery side of the lead-in area and in which a plurality of pieces of content data is recorded, and a lead-out area formed on an outer periphery side of the data recording area, wherein first copyright management information and second copyright management information with which copyrights of the plurality of pieces of content data are managed are recorded at different positions whose secrecies are different from each other.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a recording medium for recordingcontent data, a recording method and an apparatus for recording contentdata, and a reproducing method for reproducing content data, inparticular to those that allow a conventional reproducing apparatus toreproduce content data and copyright of content data to be protected.

2. Description of Related Art

A new type optical disc from which a conventional CD-DA (Compact DiscDigital Audio) player and a CD-ROM (Compact Disc Read Only Memory) canreproduce data and that has a compatibility with a computer has beendeveloped. In the new type optical disc, content data is encrypted andrecorded so as to protect the copyright thereof. It is considered thatkey information for encrypted content data will be recorded in a lead-inregion.

In other words, when content data is encrypted and recorded, there is aproblem about the position of the key information. To safely manage keyinformation, it is preferred to store it at a position the user cannoteasily access. Thus, when video data is recorded to for example a DVD(Digital Versatile Disc), key information is recorded in a read-in areaand encrypted data is recorded in a program area. Thus, in such a newtype optical disc, to prevent the user from easily accessing keyinformation, it is considered that the key information is recorded inthe lead-in area.

In the case of the DVD, since it has been developed on condition thatcontent data is encrypted to protect the copyright it. Thus, when keyinformation is recorded in the lead-in area, no considerable problemoccurs. However, in the case of such a new type optical disc, if keyinformation were recorded in a lead-in area, the conventional player anddrive, which cannot deal with the new type optical disc, could notreproduce content data.

In other words, the conventional CD-DA disc and CD-ROM disc have notbeen developed on condition that encrypted content data is recorded.Thus, the conventional player and drive do not have a function fordecrypting encrypted content data. When encrypted data that is read fromthe new type optical disc is decrypted by the conventional player anddrive, it is considered that a decrypting process for content data isperformed by software.

However, while the conventional player and driver are reproducingcontent data from an optical disc, the lead-in area cannot be accessedby the software. In other words, in the CD-ROM standard, the disc isaccessed sector by sector, each of which is composed of 98 frames. Whilethe conventional player and drive are reproducing content data, theyaccess the disc sector by sector. Thus, the conventional player anddrive cannot access the lead-in area. Consequently, when key informationis recorded in the lead-in areas, since the conventional player anddrive, which cannot deal with such the new type optical disc, cannotaccess the key information, they cannot decrypt content data.

A player and a drive that can deal with the new type optical disc willbe released after it is decided that key information is recorded in thelead-in area. The player and drive will be designed so that they accessthe lead-in area, obtain key information, and decrypt encrypted contentdata with the obtained key information. Thus, when the player and drivethat can deal with the new type optical disc become common, the problemof the conventional player and drive that cannot access key informationin the lead-in area and reproduce content data will be solved.

In a transitional period until the player and drive that can deal withthe new type optical disc become common, the conventional player anddrive, which cannot deal with the new type optical disc, reads encryptedcontent data from the new type optical disc and decrypts the encryptedcontent data. In such a transitional period, however, since the keyinformation in the lead-in area cannot be accessed, there will be aproblem of which encrypted content data cannot be decrypted.

To solve such a problem, it is considered that key information isrecorded in a program area so that the conventional drive and player,which cannot deal with the new type optical disc, can decrypt contentdata.

However, the secrecy of key information recorded in the program area islower than that recorded in the lead-in area. Thus, when key informationis recorded in the program area, although the conventional drive andplayer, which cannot deal with the new type optical disc, can decryptcontent data, the key information recorded in the program area isillegally taken out. As a result, it is considered that since thecontent data will be illegally reproduced and copied, the copyrightthereof cannot be protected.

Therefore, an object of the present invention is to provide a recordingmedium, a recording method and apparatus, and a reproducing method thatallow a reproducing apparatus that cannot deal with encrypted contentdata to decrypt encrypted content data and that the copyright thereof tobe securely protected.

BRIEF SUMMARY OF THE INVENTION

The present invention is a data recording medium on which a plurality ofpieces of content data are recoded in a program area, two types ofcopyright management information that are first and second copyrightmanagement information for managing copyrights of the plurality ofpieces of content data being recorded at different positions whosesecrecies are different from each other.

The present invention is a data recording method, comprising steps ofrecording a plurality of pieces of content data in a program area of adata recording medium, and recording two types of copyright managementinformation that are first and second copyright management informationat different positions whose secrecies are different from each other.

The present invention is a data recording apparatus comprising means forrecording a plurality of pieces of content data in a program area of adata recording medium, and means for recording two types of copyrightmanagement information that are first and second copyright managementinformation at different positions whose secrecies are different fromeach other.

The present invention is a data recording medium on which a plurality ofpieces of content data are encrypted and recorded in a program area, atleast two types of key information that are first and second keyinformation being recorded at different positions whose secrecies aredifferent from each other.

The present invention is a data recording method, comprising the stepsof encrypting a plurality of pieces of content data and recording theencrypted plurality of pieces of content data to a program area of adata recording medium and recording at least two types of keyinformation that are first and second key information at differentpositions whose secrecies are different from each other.

The present invention is a data recoding apparatus comprising means forencrypting a plurality of pieces of content data and recording theencrypted plurality of pieces of content data to a program area of adata recording medium and means for recording at least two types of keyinformation that are first and second key information at differentpositions whose secrecies are different from each other.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view for describing an example of an optical discaccording to an example of the present invention;

FIG. 2 is a schematic diagram for describing an example of the opticaldisc according to an example of the present invention;

FIG. 3 is a schematic diagram for describing a key locker;

FIG. 4 is a schematic diagram for describing an example of the opticaldisc,

FIG. 5 is a block diagram for describing an encrypting process for theoptical disc;

FIG. 6 is a block diagram for describing a decrypting process for theoptical disc;

FIG. 7 is a schematic diagram for describing a key locker of the opticaldisc;

FIG. 8 is a schematic diagram for describing a key locker of the opticaldisc;

FIG. 9 is a schematic diagram for describing a key locker of the opticaldisc;

FIG. 10 is a schematic diagram for describing a key locker of theoptical disc;

FIG. 11A and FIG. 11B are a block diagram for describing an encryptingprocess for the optical disc according to the present invention;

FIG. 12 is a block diagram for describing a decrypting process for theoptical disc according to an example of the present invention;

FIG. 13 is a block diagram for describing a decrypting process for theoptical disc according to an example of the present invention;

FIG. 14 is a block diagram for describing a key locker of the opticaldisc according to an example of the present invention;

FIG. 15 is a block diagram for describing a key locker of the opticaldisc according to an example of the present invention;

FIG. 16A and FIG. 16B are a block diagram of an example of an opticaldisc recoding apparatus according to an example of the presentinvention;

FIG. 17 is a block diagram showing an example of a reproducing apparatusfor reproducing data from the optical disc according to an example ofthe present invention;

FIG. 18 is a block diagram showing another example of the reproducingapparatus for reproducing data from the optical disc according to anexample of the present invention; and

FIG. 19 is a flow chart for describing another example of thereproducing apparatus for reproducing data from the optical discaccording to an example of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Next, with reference to the accompanying drawings, an embodiment of thepresent invention will be described. FIG. 1 and FIG. 2 show a structureof an optical disc according to the present invention. The diameter ofthe optical disc 1 according to the present invention is 120 mm. A hole2 is formed at the center of the optical disc 1. The physical shape ofthe optical disc 1 is the same as that of the conventional CD. There isanother optical disc 1 having a diameter of 80 mm, which is referred toas CD single.

In addition, there are three types of optical discs 1 categorized asreproduction only type optical disc, write once type optical disc, andrecordable type optical disc.

In the reproduction only type optical disc 1, a recording layer is madeof aluminum. In the reproduction only type optical disc 1, informationis recorded as physical pits. Normally, such a disc is produced by astamper.

In the write once type optical disc 1, a recording layer is made of anorganic coloring matter such as phthalocyanine or cyanine. In the writeonce type optical disc, when data is written, the temperature of therecording layer made of an organic coloring matter on the disc is raisedby laser light. As a result, the recording layer made of the coloringmatter is thermally deformed.

In the rewritable type optical disc 1, a recording layer is made of aphase change material. The phase change material is for example an alloyof Ag—In—Sb—Te (silver-indium-antimony-tellurium) is used. Such a phasechange material has a crystal phase and an amorphous phase. When theoutput level of the laser light is high, namely the intensity of thelaser light is high, the temperature of the recording layer made of thephase change material is raised over the melting point and then quicklycooled. As a result, the recording layer becomes an amorphous state.When the output level of the laser light is low, namely the intensity ofthe laser light is relatively low, the temperature of the recordinglayer made of the phase change material is raised and then graduallycooled. As a result, the recording layer becomes a crystal state.

As shown in FIG. 2, a first lead-in area LI1 is formed on the innermostperiphery of the optical disc. On the outer periphery of the lead-inarea LI1, a first program area PA1 is formed. On the outer periphery ofthe first program area PA1, a first lead-out area LO1 is formed. In thefirst program area PA1, audio content data is recorded in the samerecording format as the CD-DA (Compact Disc Digital Audio) standard.

Outside the first lead-out area LO1, a second lead-in area LI2 isformed. On the outer periphery of the lead-in area LI2, a second programarea PA2 is formed. Outside the second program area PA2, a secondlead-out area is formed. In the second program area LO2, audio data thathas been compressed corresponding to for example ATRAC3 compressingsystem is encrypted and recorded as content data.

Content key data with which encrypted content data in the second programarea PA2 is decrypted is contained in first key locker data K_LOCK1 andrecorded in the second lead-in area LI2.

To allow the conventional drive, which cannot deal with the optical disc1 to decrypt encrypted content data, content key data with whichencrypted content data in the second program area PA2 is decrypted iscontained in second key locker data K_LOCK2 and recorded in the programarea PA2.

In addition, application data of a software player SFT1 that is adecryption process program for decrypting encrypted content datarecorded in the program area PA2 is recorded in the program area PA2.

The key locker data K_LOCK1 and K_LOCK2 are data of which content keydata has been encoded and encrypted. The key locker data K_LOCK1 andK_LOCK2 also contain copyright management information DRM (DigitalRights Management).

Key locker data is data of which a plurality of pieces of content keydata are encoded and encrypted. Since a plurality of pieces of contentkey data which have been encoded and encrypted can be treated as a reallocker that stores a plurality of content keys. Thus, they are referredto as key locker data.

In addition, copyright management information DRM with which copyrightmanagements such as reproduction restrictions and copy restrictions ofindividual pieces of content data are performed can be contained in thekey locker data. With the copyright management information DRM, forexample “only reproduction” and “reproduction and copy permitted” can bedesignated. In addition, “copy restrictions”, the number of copies inthe copy restrictions such as “one copy”, “five copies”, and so forthcan be designated. In addition, it is considered that “net distributionor distributed data copy permitted” is designated.

FIG. 3 is an example of the structure of a key locker portion. As shownin FIG. 3, at the beginning of the key locker portion, a data portionthat represents a version number is formed. Next, a data portion thatrepresents the number of pieces of content key data is formed. Next,content key data KC1, KC2, . . . corresponding to the number of piecesof the content key data are formed. The content key data KC1, KC2, . . .are composed of for example of 48 bytes each. Next, a data portion thatrepresents the number of pieces of the copyright management informationis formed. Next, copyright management information DRM1, DRM2, . . .corresponding to the number of pieces that the data portion representsare formed. The copyright management information DRM1, DRM2 . . . arecomposed of 16 bytes each. Next, a CRC (Cyclic Redundancy Check) codewith which an error of 16 bytes is detected is added. The structure ofthe key locker data shown in FIG. 3 is just an example. Thus, the keylocker data may have another structure.

The format of the key locker data K_LOCK1 recorded in the lead-in areaLI2 is different from the format of the key locker data K_LOCK2 recordedin the program area PA2. In other words, the key locker data K_LOCK1 inthe high secrecy lead-in area LI2 has higher added values than the keylocker data K_LOCK2 in the low secrecy program area.

Thus, as shown in FIG. 2, in the optical disc 1 according to the presentinvention, the first key locker data K_LOCK1 is recorded in the lead-inarea LI2 and the second key locker data K_LOCK2 is recorded in theprogram area PA2.

When the player and drive that can deal with the optical disc 1 and thatwill be released in near future reproduce content data from the opticaldisc 1, they access the lead-in area LI2 and read data from the firstkey locker data K_LOCK1. The first key locker data K_LOCK1 containscontent key data KC1, KC2, . . . with which individual pieces ofencrypted content data recorded in the program area PA2 of the opticaldisc 1 are decrypted. By taking out the content key data KC1, KC2, . . .from the key locker data K_LOCK1, the encrypted content data in theprogram area PA2 can be decrypted.

By performing a software process for accessing the program area PA2, theconventional player and drive, which cannot deal with the optical disc1, can read data from the second key locker data K_LOCK2. In otherwords, the player and drive can take out the content key data KC1, KC2,. . . from the second key locker data and perform a decrypting processfor the encrypted content data recorded in the program area PA2 with thecontent key data KC1, KC2, . . .

Next, an encrypting process and a decrypting process for content data ofthe optical disc 1 according to the present invention will be described.Before describing the encrypting process and the decrypting process forthe optical disc 1 according to the present invention, their basicencrypting process and decrypting process will be described.

In an optical disc 1A for which the basic encrypting and decryptingprocesses will be described, as shown in. FIG. 4, on the innermostperiphery of the optical disc 1A, a first lead-in area LI10 is formed.On the outer periphery of the lead-in area LI10, a first program areaPA10 is formed. Outside the first program area PA10, a first lead-outarea LO10 is formed. In the first program area PA10, audio content datahas been recorded in the same recording format as the CD-DA standard.Outside the first lead-out area LO10, a second lead-in area LI20 isformed. On the outer periphery of the lead-out area LI20, a secondprogram area PA20 is formed. Outside-the second program area, a secondlead-out area LO20 is formed. In the second program area PA20, contentdata that had been compressed corresponding to for example ATRAC3 andencrypted has been recorded. Content key data with which encryptedcontent data recorded in the second program area PA20 is decrypted iscontained in a key locker K_LOCK0 and recorded in the second lead-inarea LI20.

FIG. 5 shows a process for encrypting content data and recording it tothe second program area PA20 of the conventional optical disc 1A.

In FIG. 5, content data C1, C2, . . . are supplied to content data inputterminals 11A, 11B, . . . , respectively. The content data C1, C2, . . .are for example audio data of music programs compressed corresponding tofor example ATRAC3. The content data C1, C2, . . . supplied from thecontent data input terminals 11A, 11B, . . . are supplied to encryptingcircuits 12A 12B, . . . , respectively.

Content key data KC1, KC2, . . . with which the individual content dataC1, C2, . . . are encrypted are generated by a content key generatingcircuit 13. The content key data KC1, KC2, . . . supplied from thecontent key generating circuit 13 are supplied to the encryptingcircuits 12A 12B, . . . , respectively.

The content data C1, C2, . . . supplied from the content data inputterminals 11A, 11B, . . . are encrypted with the content key data KC1,KC2, . . . by the encrypting circuits 12A 12B, . . . , respectively.Content data C1 e, C2 e, . . . that have been encrypted by theencrypting circuits 12A 12B, . . . are recorded in a program area PA2 ofthe optical disc.

The content key data KC1, KC2, . . . supplied from the content keygenerating circuit 13 are supplied to a key locker generating circuit14.

The individual content data C1, C2, . . . supplied to the content datainput terminals 11A, 11B, . . . contain copyright management informationDRM1, DRM2, . . . , respectively. The copyright management informationDRM1, DRM2, . . . are information that represents reproductionrestrictions and copy restrictions with respect to the copyrightmanagement for individual pieces of content data. The copyrightmanagement information DRM1, DRM2, . . . are generated by a DRMgenerating circuit 15. With the copyright management information DRM1,DRM2, . . . , reproduction permission or prohibition, copy permission orprohibition, one generation copy permission or multi-generation copypermission, and so forth can be designated. The copyright managementinformation DRM1, DRM2, . . . generated by the DRM generating circuit 15are supplied to the key locker generating circuit 14.

The key locker generating circuit 14 encodes the content key data KC1,KC2, . . . sent from the content key generating circuit 13 and thecopyright management information DRM1, DRM2, . . . supplied from the DRMgenerating circuit 15 and generates key locker data. Output data of thekey locker generating circuit 14 is supplied to an encrypting circuit18.

Key locker key data KL is supplied from a hash calculating circuit 16 tothe encrypting circuit 18. The key locker key data KL is generated byhash calculating device key data KD and hidden code key data KH. The keylocker data generated by the key locker generating circuit 14 isencrypted with the key locker key data KL supplied from the hashcalculating circuit 16.

In other words, the device key data KD is supplied to the hashcalculating circuit 16. In addition, the hidden code key data KH issupplied from a hidden code key generating circuit 17 to the hashcalculating circuit 16. The device key data KD is stored somewhere inthe player and recorder. The hidden code key data KH is generated as arandom number by the hidden code key generating circuit 17. The hiddencode key data KH is recorded in for example a lead-in area LI20 of theoptical disc 1A.

The hash calculating circuit 16 generates the key locker key data KLwith the device key data KD and the hidden code key data KH. The keylocker key data KL is supplied to the encrypting circuit 18. Theencrypting circuit 18 encrypts the key locker key data KL supplied fromthe key locker generating circuit 14 with the key locker key data KLsupplied from the hash calculating circuit 16. Data that is recorded tokey locker data K_LOCK0 encrypted by the encrypting circuit 18 isrecorded in the lead-in area LI20 of the optical disc 1A.

Thus, in the encrypting process of the conventional optical disc 1A, theindividual content data C1, C2, . . . are encrypted with the content keydata KC1, KC2, . . . , respectively and recorded in the program areaLI20. The content key data KC1, KC2, . . . with which the individualcontent data C1, C2, . . . are encrypted are stored along with thecopyright management information DRM1, DRM2, . . . in the key lockerdata K_LOCK0 and encrypted and recorded in the lead-in area LI20 of theoptical disc 1A.

FIG. 6 shows a process for decrypting the encrypted content data C1 e,C2 e, . . . recorded on the optical disc 1A and obtaining the contentdata C1, C2, . . . , respectively.

The encrypted content data C1 e, C2 e, . . . are read from the programarea PA20. The encrypted content data C1 e, C2 e, . . . are supplied todecrypting circuits 23A, 23B, . . . , respectively.

The encrypted key locker data K_LOCK0 and the hidden code key data KHare reproduced from the lead-in area LI20 of the optical disc 1A. Thekey locker data K_LOCK0 is sent to a decrypting circuit 26. On the otherhand, the hidden code key data KH is sent to a hash calculating circuit22.

Device key data KD that is stored somewhere in the reproducing apparatusor device is taken out. The device key data KD is sent to the hashcalculating circuit 22. The hash calculating circuit 22 generates keylocker key data KL with the hidden code key data KH and the device keydata KD. The key locker key data KL is sent to the decrypting circuit26.

The decrypting circuit 26 decrypts encrypted data recorded in the keylocker K_LOCK0 with the key locker key data KL supplied from the hashcalculating circuit 22. Data that is read from the decrypted key lockerdata K_LOCK0 is sent to a key locker reproducing circuit 21. The keylocker reproducing circuit 21 takes out content key data KC1, KC2, . . .and copyright management information DRM1, DRM2, . . . from the datathat is read from the key locker K_LOCK0.

The content key data KC1, KC2, . . . taken out by the key lockerreproducing circuit 21 are supplied to decrypting circuits 23A, 23B, . .. , respectively. The copyright management information DRM1, DRM2, . . .taken out by the key locker reproducing circuit 21 are sent to a DRMdetermining circuit 24.

The DRM determining circuit 24 determines reproduction restrictions andcopy restrictions for the individual content data C1, C2, . . . with thecopyright management information DRM1, DRM2, . . . thereof. Informationof the reproduction restrictions and copy restrictions for theindividual content data C1, C2, . . . is supplied to a copy andreproduction controlling circuit 25.

The decrypting circuits 23A, 23B, . . . decrypt the encrypted contentdata C1 e, C2 e, . . . reproduced from the program area PA20 of theoptical disc 1A and obtain content data C1, C2, . . . , respectively.The decrypted content data C1, C2, . . . are supplied to the copy andreproduction controlling circuit 25.

The copy and reproduction controlling circuit 25 performs reproductionrestrictions and copy restrictions for the individual content data C1,C2, . . . corresponding to the information of the reproductionrestrictions and copy restrictions supplied from the DRM determiningcircuit 24.

Thus, in the decrypting process for the optical disc 1A, the key lockerdata K_LOCK0 is read from the lead-in area LI20 of the optical disc 1A.The key locker reproducing circuit 21 takes out the content key dataKC1, KC2, . . . and the copyright management information DRM1, DRM2, . .. from the key locker data K_LOCK0. The encrypted content data C1 e, C2e, . . . that have been read from the program area PA20 of the opticaldisc are sent to the decrypting circuits 23A, 23B, . . . , respectively.The content data C1, C2, . . . are decrypted with the content key dataKC1, KC2, . . . extracted from the key locker data K_LOCK0 in thelead-in area LI20. The key locker reproducing circuit 21 extracts thecopyright management information DRM1, DRM2, . . . . With the copyrightmanagement information DRM1, DRM2, . . . , reproductions and copies ofthe individual content data C1, C2, . . . are controlled.

In such a manner, the individual content data C1, C2, . . . of theoptical disc 1A are individually encrypted. The individual content dataC1, C2, . . . contain the copyright management information DRM1, DRM2, .. . , respectively. Reproduction conditions and copy conditions can beindividually designated for the individual content data C1, C2, . . .Thus, with the same content data recorded in the program area PA20, whenthe number of pieces of content key data KC1, KC2, . . . stored in thekey locker data K_LOCK0 is changed or the reproduction restrictions andcopy restrictions of the copyright management information DRM1, DRM2, .. . stored in the key locker data K_LOCK are changed, reproduciblecontent data, reproduction conditions, and copy conditions can bechanged.

In other words, in examples shown in FIG. 7 and FIG. 8, the same contentdata C1, C2, C3, C4, and C5 have been recorded in a program area PA2 ofan optical disc. In the example shown in FIG. 7, all content key dataKC1, KC2, KC3, KC4, and KC5 and copyright management information DRM1,DRM2, DRM3, DRM4, and DRM5 for the content data C1, C2, C3, C4, and C5have been recorded. In that case, when the copyright managementinformation DRM1, DRM2, DRM3, DRM4, and DRM5 represent reproductionpermissions, all the content data C1, C2, C3, C4, and C5 can bedecrypted.

In the example shown in FIG. 8, although the content data C1, C2, C3,C4, and C5 have been recorded on the optical disc 1A like in the exampleshown in FIG. 7, only the content key data KC1, KC2, and KC3 and thecopyright management information DRM1, DRM2, and DRM3 for the contentdata C1, C2, and C3 have been recorded in the key locker data K_LOCK0.In that case, although the content data C1, C2, C3, C4, and C5 have beenrecorded on the optical disc 1A, only the content data C1, C2, and C3can be reproduced.

Thus, even if the same content data is recorded on the optical disc 1A,when the number of pieces of content key data stored in the key lockerdata K_LOCK0 is restricted, the number of pieces of reproducible contentdata can be restricted.

In examples shown in FIG. 9 and FIG. 10, the same content data C1, C2,C3, C4, and C5 have been recorded in the program area PA20 of theoptical disc 1A. In the example shown in FIG. 9, the content key dataKC1, KC2, KC3, KC4, and KC5 and the copyright management informationDRM1, DRM2, DRM3, DRM4, and DRM5 that represent copy permissions havebeen recoded in the key locker data K_LOCK0. In that case, since all thecopyright management information DRM1, DRM2, DRM3, DRM4, and DRM5represent copy permissions, all the content data C1, C2, C3, C4, and C5can be copied.

In the example shown in FIG. 10, although the content data C1, C2, C3,C4, and C5 have been recorded on the optical disc 1A as in the exampleshown in FIG. 9, the content key data KC1, KC2, KC3, KC4, and KC5 andthe copyright management information DRM1, DRM2, DRM3, DRM4, and DRM5that represent copy prohibitions have been recorded in the key lockerdata K_LOCK0. In that case, since all the copyright managementinformation DRM1, DRM2, DRM3, DRM4, and DRM5 represent copyprohibitions, the content data C1, C2, C3, C4, and C5 cannot be copied.

Thus, even if the same content data C1, C2, C3, C4, and C5 are recordedon the optical disc 1A, when the copyright management information DRM1,DRM2, DRM3, DRM4, and DRM5 stored in the key locker data K_LOCK0 arechanged, the number of pieces of reproducible content data, copyconditions, and reproduction conditions are changed.

According to the embodiment of the present invention, using thatstructure, even if data is reproduced from the same disc, the number ofpieces of reproducible content data, the copy conditions, andreproduction conditions can be changed depending on whether the drivethat can deal with the optical disc 1 or the conventional drive thatcannot deal with the optical disc 1 is used.

Next, the encrypting process and the decrypting process for the opticaldisc 1 according to the present invention will be described.

FIG. 11A and FIG. 11B show the encrypting process for the optical disc 1according to the present invention. In FIG. 11A and FIG. 11B, contentdata C1, C2, . . . are supplied to content data input terminals 31A,31B, 31C, . . . , respectively. The content data C1, C2, . . . arecontent data that has been compressed corresponding to for exampleATRAC3. The content data C1, C2, . . . supplied from the content datainput terminals 31A, 31B, 31C, . . . are supplied to encrypting circuits32A, 32B, . . . , respectively.

Content key data KC1, KC2, . . . with which the individual content dataC1, C2, . . . are encrypted are generated by a content key generatingcircuit 33. The content key data KC1, KC2, . . . are supplied to theencrypting circuits 32A, 32B, . . . , respectively.

The encrypting circuits 32A, 32B, . . . encrypt the content data C1, C2,. . . supplied from the content data input terminals 31A, 31B, . . .with the content key data KC1, KC2, . . . supplied from the content keygenerating circuit 33, respectively. Content data C1 e, C2 e, . . .encrypted by the encrypting circuits 32A, 32B, . . . are recorded in aprogram area PA2 of the optical disc 1.

The content key data KC1, KC2, . . . supplied from the content keygenerating circuit 33 are supplied to selectors 38A and 38B. Theselectors 38A and 38B select desired content key data from the contentkey data KC1, KC2, . . . generated by the content key generating circuit33. Content key data selected by the selectors 38A and 38B is suppliedto key locker generating circuits 34A and 34B, respectively.

The individual content data C1, C2, . . . supplied to the content datainput terminals 31A, 31B, . . . contains copyright managementinformation DRM1, DRM2, . . . , respectively. The copyright managementinformation DRM1, DRM2, . . . are information of reproductionrestrictions and copy restrictions with respect to the copyrightmanagement for content data. With the copyright management informationDRM1, DRM2, . . . , reproduction permission or prohibition, copypermission or prohibition, one generation copy permission ormulti-generation copy permission, and so forth can be designated.

A DRM generating circuit 35A generates copyright management informationDRM1A, DRM2A, DRM3A, . . . to be recorded in the read-in area LI2. Thecopyright management information DRM1A, DRM2A, DRM3A, . . . generated bythe DRM generating circuit 35A are supplied to a selector 39A.

A DRM generating circuit 35B generates copyright management informationDRM1B, DRM2B, . . . to be recorded in the program area PA2. Thecopyright management information DRM1B, DRM2B, . . . generated by theDRM generating circuit 35B are supplied to a selector 39B.

The selectors 39A and 39B select desired copyright managementinformation from the copyright management information DRM1A, DRM2A, . .. generated by the DRM generating circuit 35A and from the copyrightmanagement information DRM1B, DRM2B, . . . generated by the DRMgenerating circuit 35B. The copyright management information selected bythe selectors 39A and 39B is supplied to the key locker generatingcircuits 34A and 34B.

The key locker generating circuit 34A encodes the content key data KC1,KC2, . . . sent from the content key generating circuit 33 and thecopyright management information DRM1A, DRM2A, . . . sent from the DRMgenerating circuit 35A and generates data to be recorded in the keylocker portion. Output data of the key locker generating circuit 34A issupplied to an encrypting circuit 41A.

Key locker key data KL1 is supplied from a hash calculating circuit 36Ato the encrypting circuit 41A. The key locker key data KL1 is generatedby hash calculating device key data KD and hidden code key data KH1.With the key locker key data KL1, data supplied from the key lockergenerating circuit 34A and to be recorded in the key locker portion isencrypted.

In other words, the device key data KD is supplied to the hashcalculating circuit 36A. In addition, the hidden code key data KH1supplied from a hidden code key generating circuit 37A is supplied tothe hash calculating circuit 36A. The device key data KD is storedsomewhere in the player and recorder. The hidden code key data KH1 isgenerated as a random number by the hidden code key generating circuit37A. The hidden code key data KH1 is recorded in for example the lead-inarea LI2 of the optical disc 1.

With the device key data KD and the hidden code key data KH1 generatedby the hidden code key generating circuit 37A, the hash calculatingcircuit 36A generates the key locker key data KL1. The key locker keydata KL1 is supplied to the encrypting circuit 41A. The encryptingcircuit 41A encrypts key locker information supplied from the key lockergenerating circuit 34A with the key locker key data KL1 supplied fromthe hash calculating circuit 36A.

Key locker data K_LOCK1 that has been generated by the key lockergenerating circuit 34A and encrypted by the encrypting circuit 41A isrecorded in the lead-in area LI2 of the optical disc 1.

The key locker generating circuit 34B encodes the content key data KC1,KC2, . . . sent from the content key generating circuit 33 and thecopyright management information DRM1B, DRM2B, . . . sent from the DRMgenerating circuit 35B and generates key locker data. The key lockerdata generated by the key locker generating circuit 34B is supplied toan encrypting circuit 41B.

Key locker key data KL2 supplied from a hash calculating circuit 36B issupplied to the encrypting circuit 41B. The encrypting circuit 41Bencrypts the key locker data supplied from the key locker generatingcircuit 34B with the key locker key data KL2 supplied from the hashcalculating circuit 36B. The key locker key data KL2 is generated byhash calculating the device key data KD and hidden code key data KH2.

In other words, the device key data KD is supplied to the hashcalculating circuit 36B. In addition, the hidden code key data KH2supplied from the hidden code key generating circuit 37B is supplied tothe hash calculating circuit 36B. The hidden code key data KH2 isgenerated as a random number by the hidden code key generating circuit37B. The hidden code key data KH2 is recorded in for example the programarea PA2 of the optical disc 1.

The hash calculating circuit 36B generates the key locker key data KL2with the device key data KD and the hidden code key data KH2 generatedby the hidden code key generating circuit 37B. The key locker key dataKL2 is supplied to the encrypting circuit 41B. The encrypting circuit41B encrypts the key locker data supplied from the key locker generatingcircuit 34B with the key locker key data KL2 supplied from the hashcalculating circuit 36B.

Key locker data K_LOCK2 that has been generated by the key lockergenerating circuit 34B and encrypted by the encrypting circuit 41B isrecorded in the program area PA2 of the optical disc 1.

A program generating circuit 40 generates application data for asoftware player SFT1 with which content data is decrypted. Theapplication data of the software player SFT1 is recorded in the programarea PA2 of the optical disc.

As described above, in the encrypting process of the optical disc 1according to the present invention, the individual content data C1, C2,. . . are encrypted with the content key data KC1, KC2, . . . ,respectively and recorded in the program area PA2 of the optical disc 1.The content key data KC1, KC2, . . . with which the individual contentdata C1, C2, . . . are encrypted are stored along with the copyrightmanagement information DRM1A, DRM2A, . . . in the key locker dataK_LOCK1 and recorded in the lead-in area LI2 of the optical disc 1. Inaddition, the content key data KC1, KC2, . . . with which the individualcontent data C1, C2, . . . are encrypted are stored along with thecopyright management information DRM1B, DRM2B, . . . in the key lockerdata K_LOCK2 and recorded in the program area PA2 of the optical disc 1.

FIG. 12 and FIG. 13 show a decrypting process for content data of theoptical disc 1 according to the present invention. In the optical discaccording to the present invention, the decrypting process performedwhen the drive and player that can deal with the optical disc 1reproduces content data therefrom is different from the decryptingprocess performed when the drive and player that cannot deal with theoptical disc 1 reproduces content data therefrom. FIG. 12 shows adecrypting process performed when the drive or player that can deal withthe optical disc 1 reproduces content data therefrom. FIG. 13 shows adecrypting process performed when the drive or player that cannot dealwith the optical disc 1 reproduces content data therefrom.

In FIG. 12, encrypted content data C1 e, C2 e, . . . are reproduced froma program area PA2 of the optical disc 1. The encrypted content data C1e, C2 e, . . . are supplied to decrypting circuits 43A, 43B, 43C, . . ., respectively.

Key locker data K_LOCK1 and hidden code key data KH1 are read from alead-in area LI2 of the optical disc 1. The key locker data K_LOCK1 issupplied to a decrypting circuit 47.

The hidden code key data KH1 is read from the lead-in area LI2 of theoptical disc 1. The hidden code key data KH1 is supplied to a hashcalculating circuit 42. Device key data KD is taken out from theapparatus or device that reproduces the optical disc 1. The device keydata KD is sent to the hash calculating circuit 42. The hash calculatingcircuit 42 generates key locker key data KL1 with the hidden code keydata KH1 and the device key data KD. The key locker key data KL1 is sentto a key locker reproducing circuit 48.

The decrypting circuit 47 decrypts key locker data K_LOCK1 with the keylocker key data KL1 supplied from the hash calculating circuit 42. Anoutput of the decrypting circuit 47 is supplied to the key lockerreproducing circuit 48.

The key locker reproducing circuit 48 takes out the content key dataKC1, KC2, . . . and copyright management information DRM1A, DRM2A, . . .from the key locker data K_LOCK1.

The content key data KC1, KC2, . . . taken out by the key lockerreproducing circuit 48 are supplied to decrypting circuits 43A, 43B, . .. , respectively. The copyright management information DRM1A, DRM2A, . .. taken out by the key locker reproducing circuit 48 are supplied to aDRM determining circuit 44.

The DRM determining circuit 44 determines reproduction restrictions andcopy restrictions of the individual content data C1, C2, . . . with thecopyright management information DRM1A, DRM2A, . . . thereof,respectively. Information of the reproduction restrictions and copyrestrictions of the individual content data C1, C2, . . . are suppliedto a copy and reproduction controlling circuit 45.

The decrypting circuits 43A, 43B, . . . decrypt the encrypted contentdata C1 e, C2 e, C3 e. . . reproduced from the program area PA2 of theoptical disc 1 with the content key data KC1, KC2, . . . sent from thekey locker reproducing circuit 48 and obtains the content data C1, C2, .. . , respectively. The decrypted content data C1, C2, . . . are sent tothe copy and reproduction controlling circuit 45. The copy andreproduction controlling circuit 45 performs reproduction restrictionsand copy restrictions for the individual content data C1, C2, . . . withthe information of the reproduction restrictions and copy restrictionssupplied from the DRM determining circuit 44.

As described above, in the decrypting process of the drive and playerthat can deal with the optical disc 1, the key locker data K_LOCK1 isread from the lead-in area LI2 of the optical disc 1. The key lockerreproducing circuit 48 takes out the content key data KC1, KC2, . . .and the copyright management information DRM1A, DRM2A, . . . from thekey locker data K_LOCK1. The encrypted content data C1 e, C2 e, . . .reproduced from the program area PA2 of the optical disc 1 are sent tothe decrypting circuits 43A, 43B, . . . , respectively. The encryptedcontent data C1 e, C2 e, . . . are decrypted with the content key dataKC1, KC2, . . . taken out from the key locker data K_LOCK1 of thelead-in area LI2. As a result, the content data C1, C2, . . . areobtained. The key locker reproducing circuit 48 obtains the copyrightmanagement information DRM1A, DRM2A, . . . and controls thereproductions and copies of the individual content data C1, C2, . . .with the copyright management information DRM1A, DRM2A, . . . ,respectively.

FIG. 13 shows a decrypting process of the conventional player and driverthat cannot deal with the optical disc 1.

In FIG. 13, an application of a software player SFT1 is read from aprogram area PA2 of the optical disc 1. Application data of the softwareplayer SFT1 is sent to a software program executing circuit 60. With theapplication data of the software player SFT1, a decrypting process canbe executed by software. The application of the software player SFT1 maynot be the main body of the application that executes the decryptingprocess, but a part thereof.

Key locker data K_LOCK2 and hidden code key data KH2 are read from theprogram area PA2. The key locker key data K_LOCK2 is supplied to adecrypting circuit 57.

The hidden code key data KH2 is sent to a hash calculating circuit 52.Device key data KD is taken out from the device. The device key data KDis sent to the hash calculating circuit 52. The hash calculating circuit52 generates key locker key data KL2 with the hidden code key data KH2and the device key data KD. The key locker key data KL2 is sent to thedecrypting circuit 57.

The decrypting circuit 57 decrypts data of the key locker data K_LOCK2with the key locker key data KL2 supplied from the hash calculatingcircuit 52. The key locker data K_LOCK2 decrypted by the decryptingcircuit 57 is supplied to a key locker reproducing circuit 51.

The key locker reproducing circuit 51 takes out content key data KC1,KC2, . . . and copyright management information DRM1B, DRM2B, . . . fromthe key locker data K_LOCK2. The content key data KC1, KC2, . . . takenout by the key locker reproducing circuit 51 are supplied to decryptingcircuits 53A, 53B, 53C, . . . , respectively. The copyright managementinformation DRM1B, DRM2B, . . . taken out by the key locker reproducingcircuit 51 are sent to a DRM determining circuit 54.

The DRM determining circuit 54 determines reproduction restrictions andcopy restrictions of the individual content data C1, C2, . . . with thecopyright management information DRM1B, DRM2B, . . . , respectively. Theinformation of the reproduction restrictions and copy restrictions ofthe individual content data C1, C2, . . . is sent to a copy andreproduction controlling circuit 55.

The decrypting circuits 53A, 53B, 53C, . . . decrypt the encryptedcontent data C1 e, C2 e, C3 e, . . . reproduced from the program areaPA2 of the optical disc 1 and obtains the decrypted content data C1, C2,. . . , respectively. The decrypted content data C1, C2, . . . are sentto the copy and reproduction controlling circuit 55. The copy andreproduction controlling circuit 55 performs the reproductionrestrictions and copy restrictions of the content data C1, C2, . . .with the information of the reproduction restrictions and copyrestrictions supplied from the DRM determining circuit 54.

In the decrypting process of the drive and player that cannot deal withthe optical disc 1, the key locker data K_LOCK2 is read from the programarea PA2 of the optical disc 1. The key locker reproducing circuit 51takes out the content key data KC1, KC2, . . . and the copyrightmanagement information DRM1B, DRM2B, . . . from the key locker dataK_LOCK2. The encrypted content data C1 e, C2 e, . . . reproduced fromthe program area PA2 of the optical disc 1 are sent to the decryptingcircuits 43A, 43B, . . . , respectively. The encrypted content data C1e, C2 e, . . . are decrypted with the content key data KC1, KC2, . . .taken out from the key locker data K_LOCK2 of the program area PA2,respectively. As a result, the decrypted content data C1, C2, . . . areobtained. The copyright management information DRM1B, DRM2B, . . . aretaken out by the key locker reproducing circuit 51. With the copyrightmanagement information DRM1B, DRM2B, . . . , the reproductions andcopies of the individual content data C1, C2, . . . are controlled.

As shown in FIG. 11A and FIG. 11B, in the encrypting process for theoptical disc 1 according to the present invention, the selectors 38A and38B are provided. The selectors 38A and 38B select desired content keydata KC1, KC2, . . . from the content key data KC1, KC2, . . . suppliedto the key locker generating circuits 34A and 34B and contain theselected content key data in the key locker data K_LOCK1 and K_LOCK2.The DRM generating circuit 35A, which generates the copyright managementinformation DRM1A, DRM2A, . . . contained in the key locker data K_LOCK1recorded in the lead-in area LI2, and the DRM generating circuit 35B,which generates the copyright management information DRM1B, DRM2B, . . .contained in the key locker data K_LOCK2 recorded in the program areaPA2, are separately disposed. The selectors 39A and 39B select desiredcopyright management information from the copyright managementinformation DRM1A, DRM2A, . . . and DRM1B, DRM2B, . . . supplied to thekey locker generating circuits 34A and 34B, respectively.

Thus, the content key data KC1, KC2, . . . and the copyright managementinformation DRM1A, DRM2A, . . . contained in the key locker data K_LOCK1recorded in the lead-in area LI2 and the content key data KC1, KC2, . .. and the copyright management information DRM1B, DRM2B, . . . containedin the key locker data K_LOCK2 recorded in the program area PA2 can beseparately designated.

In such a structure, when contents of the key locker data K_LOCK1recorded in the lead-in area LI2 and the contents of the key locker dataK_LOCK2 recorded in the program area PA2 are separately designated,content data reproduced by the player and drive that can deal with theoptical disc 1 and content data reproduced by the drive and player thatcannot deal with the optical disc 1 can be distinguished in the numberof pieces of reproducible content data, titles, reproduction conditions,and copy conditions.

In other words, it is supposed that the key locker data K_LOCK1 recordedin the lead-in area LI2 can be read by only the player and drive thatcan deal with the optical disc 1. Thus, since the secrecy is high, thepossibility of which content data is illegally reproduced and copied islow. In contrast, the key locker data K_LOCK2 recorded in the programarea PA2 is read by the conventional player and drive. Thus, since thesecrecy is low, the possibility of which content data is illegallyreproduced and copied is high.

Thus, it is considered that with the key locker data K_LOCK1, which isrecorded in the high secrecy lead-in area LI2, the number ofreproducible contents can be increased, the qualities of reproduciblecontents are higher or management restrictions with respect to copyrightmanagement are more advantageous such as more added values withadditional information than with the key locker data K_LOCK2 recorded inthe low secrecy program area PA2. As a result, with additionalinformation, added values can be increased.

For example, as shown in FIG. 14, it is assumed that content data C1,C2, C3, C4, C5, . . . have been recorded in a program area PA2 of theoptical disc 1. In key locker data K_LOCK1 in a high secrecy lead-inarea LI2, content key data KC1, KC2, KC3, KC4, and KC5 of the contentdata C1, C2, C3, C4, C5, . . . are recorded. In addition, copyrightmanagement information DRM1A, DRM2A, DRM3A, DRM4A, DRM5A, . . . arerecorded.

In contrast, in key locker data K_LOCK2 in a low secrecy program areaPA2, content key data KC1, KC2, KC3, . . . and copyright managementinformation DRM1B, DRM2B, DRM3B, . . . of the content data C1, C2, C3, .. . are recorded.

In that case, when the key locker data K_LOCK1 in the lead-in area LI2is used, all the content data C1, C2, C3, C4, C5, . . . can be decryptedand reproduced. In contrast, when the key locker data K_LOCK2 in theprogram area PA2 is used, since there are not the content key data KC4and KC5 with which the content data C4 and C5 are decrypted, only threecontent data C1, C2, C3, . . . can be reproduced.

Thus, although the new type player and drive that can deal with theoptical disc 1 can reproduce the content data C1, C2, C3, C4, C5, . . ., the drive and player that cannot deal with the optical disc 1 canreproduce only the content data C1, C2, C3, . . . .

In that example, with the key locker data K_LOCK1 in the high secrecylead-in area LI, the number of pieces of reproducible content data thusadded values are larger than that with the key locker data K_LOCK2 inthe low secrecy program area PA2.

For example, as shown in FIG. 15, in key locker data K_LOCK1 in a highsecrecy lead-in area LI2, content key data KC1, KC2, KC3, KC4, and KC5and copyright management information DRM1, DRM2, DRM3, DRM4, DRM5, . . .of content data C1, C2, C3, C4, C5, . . . have been recorded. All thecopyright management information DRM1A, DRM2A, DRM3A, DRM4A, DRM5A, . .. represent copy permissions.

In contrast, in key locker data K_LOCK2 in a low secrecy program areaPA2, content key data KC1, KC2, . . . KC3, KC4, and KC5 and copyrightmanagement information DRM1B, DRM2B, DRM3B, DRM4B, DRM5B, . . . ofcontent data C1, C2, C3, C4, C5, . . . have been recorded. All thecopyright management information DRM1B, DRM2B, DRM3B, DRM4B, DRM5B, . .. represent copy prohibitions.

In that case, when the key locker data K_LOCK1 in the lead-in area LI2is used, all the recorded content data C1, C2, C3, C4, C5, . . . can becopied. However, when the key locker data K_LOCK2 in the program areaPA2 is used, all the content data C1, C2, C3, C4, C5, . . . cannot becopied.

Thus, although the new type player and drive, which can deal with theoptical disc 1, can copy the content data C1, C2, C3, C4, C5, . . . ,the conventional drive and player, which cannot deal with the opticaldisc 1 can reproduce the content data C1, C2, C3, C4, C5, . . . , butthey cannot not copy them.

In that example, with the key locker data in the high secrecy lead-inarea, the management restrictions with respect to the copyrightmanagement are more advantageous and added values becomes higher thanthose with the key locker data in the low secrecy program area.

Thus, when the key locker data K_LOCK1 and K_LOCK2 are recorded in thelead-in area LI2 and the program area PA2, respectively, with the keylocker data K_LOCK1 in the high secrecy lead-in area LI2, the number ofpieces of reproducible content data is larger, the copyright managementis more advantageous, and added values are larger than with the keylocker data K_LOCK2 in the program area PA2.

It is supposed that the key locker data K_LOCK1 and K_LOCK2 recorded inthe high secrecy lead-in area LI2 and low secrecy program area PA2 havethe following structures.

In the key locker data K_LOCK1 recorded in the lead-in area and/or thelead-out area, which is a high secrecy recording position, the number ofpieces of copyright management information is lower than in the keylocker data K_LOCK2 in the program area, which is a low secrecyrecording position. As a result, with the copyright managementinformation recorded in the lead-in area and/or the lead-out area, thenumber of reproducible music programs is larger than with the copyrightmanagement information recorded in the program area.

In the key locker data K_LOCK1 recorded in the lead-in area and/or thelead-out area, which is a high secrecy recording position, themanagement restrictions of copyright management information are looserthan in the key locker data K_LOCK2 recorded in the program area, whichis a low secrecy recording position. For example, when the copyrightmanagement information of the key locker recorded in the lead-in areaand/or the lead-out area represents copy permissions, the copyrightmanagement information of the program area may represent copyprohibitions. Likewise, when the copyright management information of thekey locker data recorded in the lead-in area and/or the lead-out arearepresents multi-generation copy permissions, the copyright managementinformation of the program area may represent one-generation copypermissions.

Copyright management information of the key locker data K_LOCK1 recordedin the lead-in area and/or the lead-out area, which is a high secrecyrecording position, may represent higher quality content data and moreadded values with additional information than copyright managementinformation of the key locker data K_LOCK2 in the program area, which isa low secrecy position. For example, while copyright managementinformation of the key locker data K_LOCK1 in the lead-in area and/orthe lead-out area represents reproduction permission of all musicprograms, copyright management information of the key locker dataK_LOCK2 in the program area may represent reproduction permissions ofonly feature portions or narrations of music programs. In such a manner,content qualities are distinguished. Alternatively, copyright managementinformation of the key locker data K_LOCK1 recorded in the lead-in areaand/or the lead-out area may contain music programs and promotion stillpictures and moving pictures thereof. In contrast, copyright managementinformation of the key locker data K_LOCK2 in the program area maycontain only music programs, omitting their promotion still pictures andmoving pictures. In such a manner, the copyright management informationof the key locker data K_LOCK1 and the copyright management informationof the key locker data K_LOCK2 are distinguished.

The number of pieces of content key data of the key locker data K_LOCK1recorded in the lead-in area and/or the lead-out area, which is a highsecrecy recording position, is smaller than that of the key locker dataK_LOCK2 of the program area, which is a low secrecy recording position.Thus, the number of music programs reproduced with the content key dataof the key locker recorded in the key locker data K_LOCK1 recorded inthe lead-in area and/or the lead-out area is larger than that with thecontent key data of the key locker data K_LOCK2 recorded in the programarea.

With the content key data of the key locker data K_LOCK1 recorded in thelead-in area and/or the lead-out area, which is a high secrecy recordingposition, higher quality contents can be reproduced and more addedvalues can be obtained with additional information than the content keydata of the key locker data K_LOCK2 in the program area, which is a lowsecrecy recording position. For example, with the content key data ofthe key locker data K_LOCK1 recorded in the lead-in area and/or thelead-out area, which is a high secrecy recording position, all musicprograms can be reproduced. In contrast, with the content key data ofthe key locker data K_LOCK2 recorded in the program area, only featureportions and narrations of music programs can be reproduced. In such amanner, qualities of content data to be reproduced are distinguished.Alternatively, the content key data of the key locker data K_LOCK1recorded in the lead-in area and/or the lead-out area is key data formusic programs and promotion still pictures and moving pictures thereof.In contrast, the content key data of the key locker data K_LOCK2recording in the program area contain is key data for only musicprograms, omitting promotion still pictures and moving pictures. In sucha manner, they are distinguished.

Thus, the new type player and drive, which can deal with the opticaldisc according to the present invention and the conventional drive andplayer, which cannot deal with the optical disc according to the presentinvention can be distinguished in the number of reproducible contents,the qualities thereof, and added values thereof. In addition, thecopyright of the content data can be protected.

Next, a real structure of a recording apparatus will be described. InFIG. 16A and 16B, content data to be recorded in a program area PA1 issupplied to an input terminal 100. The content data is audio data thatis the same as data corresponding to CD-DA standard. The content datasupplied from the input terminal 100 is supplied to an error correctioncode encoding circuit 104.

Content data to be recorded in a program area PA2 is supplied to aninput terminal 101. The content data is audio data compressedcorresponding to a compressing system for example ATRAC3. The contentdata is supplied to an encrypting circuit 102.

The encrypting circuit 102 encrypts each piece of content data. Contentkey data KC1, KC2, . . . are supplied from a content key generatingcircuit 103 to the encrypting circuit 102. The content key generatingcircuit 103 generates the content key data KC1, KC2, . . . of theindividual contents. The content data supplied from the input terminal101 is encrypted with the content key data KC1, KC2, . . . supplied fromthe content key generating circuit 103. An output of the encryptingcircuit 102 is supplied to the error correction code encoding circuit104.

The content key data KC1, KC2, . . . generated by the content keygenerating circuit 103 are supplied to a key locker generating circuit105A. In addition, the content key data KC1, KC2, . . . are supplied toa key locker generating circuit 105B. Copyright management informationDRM1A, DRM2A, . . . and DRM1B, DRM2B, . . . are supplied from DRMgenerating circuits 106A and 106B to the key locker generating circuits105A and 105B, respectively.

The DRM generating circuit 106A generates the copyright managementinformation DRM1A, DRM2A, . . . to be contained in the key locker dataK_LOCK1 recorded in the lead-in area LI2. The DRM generating circuit106B generates the copyright management information DRM1B, DRM2B, . . .to be contained in the key locker data K_LOCK2 recorded in the programarea PA2.

The key locker generating circuit 105A generates the key locker dataK_LOCK1 recorded in the lead-in area LI2. The key locker data K_LOCK1recorded in the lead-in area LI2 is supplied to an encrypting circuit108A. Key locker key data KL1 is supplied from a hash calculatingcircuit 110A to the encrypting circuit 108A. The key locker key data KL1is generated by a hash calculating circuit 119A. The hash calculatingcircuit 119A hash-calculates hidden key data KH1 supplied from a hiddenkey generating circuit 109A and the device key data KD. The encryptingcircuit 108A encrypts the key locker data K_LOCK1. The key locker dataK_LOCK1 encrypted by the encrypting circuit 108A is supplied to a TOC(Table Of Contents) sub code generating circuit 112. The hidden code keydata KH1 supplied from the hidden key generating circuit 109A issupplied to the TOC sub code generating circuit 112.

The key locker generating circuit 105B generates the key locker dataK_LOCK2 recorded in the program area PA2. Data of the key locker dataK_LOCK2 recorded in the program area LI2 is supplied to the encryptingcircuit 108B. The key locker key data KL2 is supplied from a hashcalculating circuit 110B to the encrypting circuit 108B. The key lockerkey data KL2 is generated by a hash calculating circuit 119B. The hashcalculating circuit 119B hash calculates the hidden key data KH2supplied from a hidden key generating circuit 109B and device key dataKD. The encrypting circuit 108B encrypts the key locker data K_LOCK2.The key locker data K_LOCK2 encrypted by the encrypting circuit 108B issupplied to the error correction code encoding circuit 104.

The hidden key data KH2 supplied from the hidden key generating circuit109B is supplied to the error correction code encoding circuit 104.Application data of a software player SFT1 supplied from a softwareplayer generating circuit 118 is supplied to the error correction codeencoding circuit 104.

The error correction code encoding circuit 104 performs an errorcorrection code encoding process for content data with CIRC (CrossInterleave Reed-Solomon Code). An output of the error correction codeencoding circuit 104 is supplied to a TOC sub code adding circuit 113.The TOC sub code adding circuit 113 adds TOC data and sub code data tothe output of the error correction code encoding circuit 104.

An output of the TOC sub code adding circuit 113 is supplied to amodulating circuit 117. The modulating circuit 117 performs for exampleEFM (8 to 14 Modulation).

The optical disc 1 is placed on a turn table (not shown) and rotated bya spindle motor 120. The spindle motor 120 is driven by a spindlecontrolling circuit 123 under the control of a servo controlling circuit125 so that the spindle motor 120 rotates at constant linear velocity(CLV) or constant angular velocity (CAV).

The servo controlling circuit 125 generates various servo drive signalsof focus servo drive signal, tracking servo drive signal, thread servodrive signal, and spindle servo drive signal corresponding to a focuserror signal, a tracking error signal, and an operation command issuedfrom a system controller 130 and outputs the generated servo drivesignals to an actuator controlling circuit 126 126, a thread controllingcircuit 127, and the spindle controlling circuit 123.

An optical pickup 121 is a mechanism that condenses laser light of asemiconductor laser as a light source on a signal surface of the opticaldisc 1 and scans tracks concentrically or spirally formed on the opticaldisc 1. An objective lens that condenses the laser light of the opticalpickup 121 on the signal surface of the optical disc 1 can be traveledin a focus direction and a tracking direction by an actuator (notshown). The actuator is controlled by an actuator controlling circuit126 under the control of the servo controlling circuit 125. All theoptical pickup 121 is traveled in the radius direction of the opticaldisc 1 by a thread mechanism 122. The traveling of the thread mechanism122 is controlled by the thread controlling circuit 127 under thecontrol of the servo controlling circuit 125.

Output data of the modulating circuit 117 is supplied to the opticalpickup 121. The optical pickup 121 outputs laser light whose lightingwavelength has been modulated corresponding to the output data of themodulating circuit 117. The laser light lights the recording surface ofthe optical disc 1. As a result, information is recorded on the opticaldisc 1.

In the recording apparatus, when content data is recorded in the programarea PA1, the content data supplied from the input terminal 100 issupplied to the error correction code encoding circuit 104. The errorcorrection code encoding circuit 104 performs the error correction codeencoding process for the content data.

The optical pickup 121 is traveled to the program area PA1. An output ofthe error correction code encoding circuit 104 is supplied to themodulating circuit 117. The content data supplied from the inputterminal 100 is recorded in the program area PA1.

When content data is recorded in the program area PA2, the content datasupplied from the input terminal 101 is encrypted by the encryptingcircuit 102 and supplied to the error correction code encoding circuit104. The error correction code encoding circuit 104 performs the errorcorrection code encoding process for the content data.

The key locker generating circuit 105A generates the key locker dataK_LOCK1 recorded in the lead-in area LI2. The key locker generatingcircuit 105B generates the key locker data K_LOCK2 recorded in theprogram area PA2.

The optical pickup 111 is traveled to the lead-in area LI2. The keylocker data K_LOCK1 supplied from the key locker generating circuit 105Aand recorded in the lead-in area LI2 is supplied to the TOC sub codegenerating circuit 112. The key locker data K_LOCK1 is recorded in thelead-in area LI2 of the optical disc 1.

The optical pickup 111 is traveled to the lead-in area LI2. The keylocker data K_LOCK2 supplied from the key locker generating circuit 105Band recorded in the lead-in area LI2 is supplied to the error correctioncode encoding circuit 104. An output of the error correction codeencoding circuit 104 is supplied to the modulating circuit 107. The keylocker data K_LOCK2 is recorded in the program area PA2. Applicationdata of a software player SFT1 supplied from a software playergenerating circuit 118 is sent to the error correction code encodingcircuit 104. The application data of the software player SFT1 isrecorded in the program area PA2.

FIG. 17 shows a real structure of a reproducing apparatus that can dealwith the optical disc 1 in the case that the reproducing apparatusreproduces data from the optical disc 1 according to the presentinvention.

In FIG. 17, the optical disc 1 is placed on a turn table (not shown) androtated by a spindle motor 150. The spindle motor 150 is driven by aspindle controlling circuit 152 under the control of a servo controllingcircuit 151 so that the spindle motor 150 rotates at constant linearvelocity (CLV) or constant angular velocity (CAV).

The servo controlling circuit 151 generates various servo drive signalsof focus servo drive signal, tracking servo drive signal, thread servodrive signal, and spindle servo drive signal corresponding to a focuserror signal, a tracking error signal, and an operation command issuedfrom a system controller 160 and outputs those signals to an actuatorcontrolling circuit 153, a thread controlling circuit 154, and thespindle controlling circuit 152. An optical pickup 155 is a mechanismcondenses laser light of a semiconductor laser as a light source on asignal surface of the optical disc 1 with an objective lens and scanstracks concentrically or spirally formed on the optical disc 1. All theoptical pickup 155 is traveled in the radius direction of the opticaldisc 1 by a thread mechanism 156.

When the program area PA1 is reproduced, the optical pickup 155 istraveled to the program area PA1 of the optical disc 1 by the threadmechanism 156. The optical pickup 155 reads data from the program areaPA1 of the optical disc 1. Content data in the same format as datacorresponding to for example CD-DA standard is read from the programarea PA1. An output signal of the optical pickup 155 is supplied to anerror correction code decoding circuit 162 through an RF amplifier 157,an EFM demodulating circuit 161, and a TOC sub code extracting circuit158. The error correction code decoding circuit 162 performs an errorcorrecting process for the output signal of the optical pickup 155. Anoutput of the error correction code decoding-circuit 162 is output froman output terminal 168.

When the program area PA2 is reproduced, the optical pickup 155 istraveled to the lead-in area LI2 by the thread mechanism 156. Key lockerdata K_LOCK1 is read from a lead-in area LI2. The key locker dataK_LOCK1 is supplied from the TOC sub code extracting circuit 158 to adecrypting circuit 166. Hidden key data KH1 is read from the lead-inarea LI2. The hidden key data KH1 is supplied from the TOC sub codeextracting circuit 158 to a key locker key generating circuit 167. Thekey locker key generating circuit 167 generates key locker key data KL1with device key data KD stored in the reproducing apparatus and thehidden key data KH1. The key locker key data KL1 is supplied to thedecrypting circuit 166.

The decrypting circuit 166 decrypts the key locker data K_LOCK1 with thekey locker key data KL1 supplied from the hash calculating circuit 167.An output of the decrypting circuit 166 is supplied to a key lockerreproducing circuit 164. The key locker reproducing circuit 164 takesout content key data KC1, KC2, . . . from the reproduced key locker dataK_LOCK1. The content key data KC1, KC2, . . . are supplied to adecrypting circuit 165.

The optical pickup 155 is traveled to the program area PA2 by the threadmechanism 156. Content data is read from the program area PA2. Thecontent data in the program area PA2 has been compressed correspondingto for example ATRAC3 and encrypted. An output signal of the opticalpickup 155 is supplied to the decrypting circuit 165 through the RFamplifier 157, the demodulating circuit 161, the TOC sub code extractingcircuit 158, and the error correction code decoding circuit 162.

The content key data Kc1, KC2, . . . are supplied from the key lockerreproducing circuit 164 to the decrypting circuit 165. The decryptingcircuit 165 decrypts the content data with the content key data KC1,KC2, . . . supplied from the key locker reproducing circuit 164. Thedecrypted content data is output from an output terminal 169.

The key locker reproducing circuit 164 takes out copyright managementinformation DRM1A, DRM2A, . . . from the key locker data K_LOCK1. Thecopyright management information DRM1A, DRM2A, . . . are supplied to thesystem controller 160. The system controller 160 determines thecopyright management information DRM1A, DRM2A, . . . The systemcontroller 160 performs reproduction restrictions and copy restrictionscorresponding to the copyright management information DRM1A, DRM2A, . ..

FIG. 18 shows a real structure of a reproducing apparatus that cannotdeal with the optical disc 1 in the case that the reproducing apparatusreproduces data from the optical disc 1 according to the presentinvention.

In FIG. 18, the optical disc 1 is placed on a turn table (not shown) androtated by a spindle motor 170. The spindle motor 170 is driven by aspindle controlling circuit 172 under the control of a servo controllingcircuit 171 so that the spindle motor 170 rotates at constant linearvelocity (CLV) or constant angular velocity (CAV).

The servo controlling circuit 171 generates various servo drive signalsof focus servo drive signal, tracking drive signal, thread drive signal,and spindle drive signal corresponding to a focus error signal, atracking error signal, and an operation command issued from a systemcontroller 180 and outputs those signals to an actuator controllingcircuit 173, a thread controlling circuit 174, and the spindlecontrolling circuit 172. An optical pickup 175 is a mechanism thatcondenses laser light of a semiconductor laser as a light source on asignal surface of the optical disc 1 with an objective lens and scanstracks concentrically or spirally formed on the optical disc 1. All theoptical pickup 175 is traveled in the radius direction of the opticaldisc 1 by a thread mechanism 176.

An output signal of the optical pickup 175 is supplied to a demodulatingcircuit 181 through an RF amplifier 177. The demodulating circuit 181EFM-demodulates the output signal of the optical pickup 175. Output dataof the demodulating circuit 181 is supplied to an error correction codedecoding circuit 182. The error correction code decoding circuit 182performs an CIRC error correcting process.

When a program area PA1 is reproduced, the optical pickup 175 istraveled to the program area PA1 of the optical disc 1 by the threadmechanism 176. The optical pickup 175 reads data from the program areaPA1 of the optical disc 1. Content data that has the same format as datacorresponding to CD-DA standard is read from the program area PA1. Anoutput signal of the optical pickup 175 is demodulated by thedemodulating circuit 181. The demodulated signal is sent to a TOC subcode extracting circuit 184 and the error correction code demodulatingcircuit 182. The error correction code decoding circuit 182 performs anerror correcting process. Output data of the error correction codedecoding circuit 182 is output through an interface 183.

When content data is reproduced from the program area PA2, a decryptingprocess is performed by software 191 of a personal computer 190.

In other words, when the program area PA2 is reproduced, the opticalpickup 175 is traveled to the program area PA2. Data of the softwareplayer SFT1 is read. The data of the software player SFT1 is supplied tothe personal computer 190 through the demodulating circuit 181, the TOCsub code extracting circuit 184, the error correction code decodingcircuit 182, and the interface 183.

As shown in FIG. 19, when the application of the software player isstarted (at step S1), hidden key data KH2 is read from the program areaPA2 (at step S2). The hidden key data KH2 and device key data KD arecalculated. As a result, key locker key data KL2 is generated (at stepS3).

Key locker data K_LOCK2 is read from the program area PA2 (at step S4).Data of the key locker data K_LOCK2 that has been read is decrypted withthe key locker key data KL2 generated at step S3. Content key data KC1,KC2, . . . and copyright management information DRM1B, DRM2B, . . . aretaken out from the key locker data K_LOCK2 (at step S5).

It is determined whether or not a reproduction command has been issued(at step S6). When the reproduction command has been issued, it isdetermined whether or not content key data KC1, KC2, . . . with whichcontent data corresponding to the reproduction command is decrypted arecontained in content key data KC1, KC2, . . . of the key locker dataK_LOCK2 taken out at step S5 (at step S7).

When it has been determined at step S7 that the content key data KC1,KC2, . . . with which the content data corresponding to the reproductioncommand is decrypted are contained, the flow advances to step S8. It isdetermined whether or not the content data corresponding to thereproduction command can be reproduced with the copyright managementinformation DRM1B, DRM2B, . . . of the key locker data K_LOCK2 taken outat step S5 (at step S8).

When it has been determined at step S7 that the content key data KC1,KC2, . . . with which the content data corresponding to the reproductioncommand is decrypted are not contained, the reproducing operation isstopped (at step S8).

When it has been determined at step S8 that the content datacorresponding to the reproduction command can be reproduced with thecopyright management information DRM1B, DRM2B, . . . , the opticalpickup 175 reads the content data from the program area PA2 (at stepS9). With the content key data KC1, KC2, . . . taken out from the keylocker data K_LOCK2 at step S5, the content data is decrypted (at stepS10).

When it has been determined at step S8 that the content datacorresponding to the reproduction command can be reproducedcorresponding to the copyright management information DRM1B, DRM2B, . .. the reproducing operation is stopped (at step S8).

As shown in FIG. 17, when the drive and player that can deal with theoptical disc 1 according to the present invention reproduce content datatherefrom, the content data is decrypted with the content key data KC1,KC2, . . . stored in the key locker data K_LOCK1 in the lead-in areaLI2. With the copyright management information DRM1A, DRM2A, . . .stored in the key locker data K_LOCK1 in the lead-in area LI2, thereproduction and copy of the content data are controlled.

In contrast, as shown in FIG. 18 and FIG. 19, when the conventionaldrive and player that cannot deal with the optical disc 1 reproducecontent data therefrom, with the content key data KC1, KC2, . . . storedin the key locker data K_LOCK2 in the program area PA2, the content datais decrypted. With the copyright management information DRM1B, DRM2B, .. . stored in the key locker data K_LOCK2 in the program area PA2, thereproduction and copy of the content data are controlled.

As shown in FIG. 14 and FIG. 15, the number of content key data KC1,KC2, . . . of the key locker data K_LOCK1 in the high secrecy lead-inarea LI2 is larger than the number of content key data KC1, KC2, . . .of the key locker data K_LOCK2 in the low secrecy program area PA2. Inaddition, the management conditions of the copyright managementinformation DRM1A, DRM2A, . . . of the key locker data K_LOCK1 in thehigh secrecy lead-in area LI2 are more advantageous than the managementconditions of the copyright management information DRM1B, DRM2B, . . .of the key locker data K_LOCK2 in the low secrecy program area PA2. Inthat case, the drive and player that can deal with the optical disc 1can reproduce more music programs and have more added values than theconventional drive that cannot deal with the optical disc 1.

In the forgoing example, the optical disc is a two-session disc of whicha conventional content data recording area is separated from encryptedcontent data recording area. Alternatively, the optical disc may be aone-session disc.

In addition, in the forgoing example, key locker data and hidden keydata are recorded in a lead-in area and a program area. Alternatively,key locker data and hidden key data may be recorded in a lead-out areaand a program area. Alternatively, key locker data and hidden key datamay be recorded in a lead-in area, a lead-out area, a program area.

According to the present invention, the player and drive that can dealwith the new type optical disc access a key locker recorded in thelead-in area and/or the lead-out area, obtain copyright managementinformation and content key data, and reproduce content data. The playerand drive that cannot deal with the new type optical disc access a keylocker in the program area, obtain copyright management information andcontent key data, and reproduce content data.

A key locker recorded in the lead-in area and/or the lead-out area canbe accessed by only the reproducing apparatus that can deal with the newtype optical disc. A key locker in the program area can be accessed bythe reproducing apparatus that cannot deal with the new type opticaldisc. Since the reproducing apparatus that can deal with the new typeoptical disc uses a key locker recorded in the lead-in area and/or thelead-out area, the secrecy is high. In contrast, since the reproducingapparatus that cannot deal with the new type optical disc uses a keylocker recorded in the program area, the secrecy is not secured.

According to the present invention, the copyright management informationand the content key data of the key locker recorded in the program areaare smaller than those of the key locker recorded in the lead-in areaand/or the lead-out area with respect to quantity and added values, thecopyright can be protected. In addition, since the number ofreproducible contents and qualities thereof reproduced by thereproducing apparatus that can deal with the new type optical disc aredifferent from those reproduced by the reproducing apparatus that cannotdeal with the new type optical disc, they can be distinguished. Thus,sales of the new type apparatus can be promoted. Industrial Utilization

As described above, the present invention is suitable for a recordingmedium such as an optical disc for recording content data, a recordingmethod and apparatus for recording content data on such a recordingmedium, and a reproducing method for reproducing content data.

1. A recording medium, comprising: a lead-in area; a data recording areathat is formed on an outer periphery side of the lead-in area and inwhich a plurality of pieces of content data is recorded; and a lead-outarea formed on an outer periphery side of the data recording area,wherein first copyright management information and second copyrightmanagement information with which copyrights of the plurality of piecesof content data are managed are recorded at different positions whosesecrecies are different from each other, any one of first copyrightmanagement information and second copyright management information isrecorded in any one of said lead-in area and said lead-out area, theother copyright management information being recorded in the datarecording area, a position of said data recording area providing lowersecrecy than any one of said lead-in area and said lead-out area, andthe first copyright management information and the second copyrightmanagement information are not related to encryption of the contentdata.
 2. The recording medium as set forth in claim 1, wherein the firstcopyright management information and the second copyright managementinformation are copyright management information that are different fromeach other in management conditions under which the plurality of piecesof content data are reproduced.
 3. The recording medium as set forth inclaim 2, wherein any one of the first copyright management informationand the second copyright management information is managementinformation that represents reproduction permissions of the plurality ofpieces of content data, whereas the other copyright managementinformation is management information that represents partialreproduction permissions of the plurality of pieces of content data. 4.The recording medium as set forth in claim 3, wherein one of the firstcopyright management information and the second copyright managementinformation is recorded in at least any one of the lead-in area and thelead-out area.
 5. The recording medium as set forth in claim 4, whereinthe other copyright management information of the first copyrightmanagement information and the second copyright management informationis recorded in the data recording area.
 6. The recording medium as setforth in claim 1, wherein any one of the first copyright managementinformation and the second copyright management information is stricterin management conditions of the plurality of pieces of content data thanthe other copyright management information.
 7. The recording medium asset forth in claim 1, wherein any one of the first copyright managementinformation and the second copyright management information is stricterin reproduction restriction conditions of the plurality of pieces ofcontent data than the other copyright management information.
 8. Therecording medium as set forth in claim 7, wherein any one of the firstcopyright management information and the second copyright managementinformation contains copy prohibition conditions of the plurality ofpieces of content data, whereas the other copyright managementinformation contains copy permission conditions of the plurality ofpieces of content data.
 9. The recording medium as set forth in claim 8,wherein the other copyright management information, which contains thecopy permission conditions of the plurality of pieces of content data,is recorded in at least any one of the lead-in area and the lead-outarea.
 10. The recording medium as set forth in claim 8, wherein one ofthe first copyright management information and the second copyrightmanagement information, which contains the copy prohibition conditionsof the plurality of pieces of content data, is recorded in the datarecording area.
 11. The recording medium as set forth in claim 1,wherein at least one of the plurality of pieces of content data recordedin the data recording area has been encrypted and recorded, and whereinthe first copyright management information and the second copyrightmanagement information are recorded along with key data with which theencrypted at least one of the plurality of pieces of content data isdecrypted.
 12. The recording medium as set forth in claim 11, whereinthe first copyright management information and the second copyrightmanagement information are encrypted and recorded along with the keydata with which the encrypted at least one of the plurality of pieces ofcontent data is decrypted.
 13. The recording medium as set forth inclaim 1, wherein the other copyright management information is used by areproduction device when the reproduction device is not capable ofreading the lead-in area, or the lead-out area, of the recording medium.14. A recording method, comprising the steps of: recording a pluralityof pieces of content data to a recording medium; and recording firstcopyright management information and second copyright managementinformation with which copyrights of the plurality of pieces of contentdata are managed at different positions of the recording medium,secrecies of the different positions being different from each other,wherein one of the first copyright management information and the secondcopyright management information is recorded in at least any one of alead-in area that is formed on an inner periphery side of a recordingarea in which the plurality of pieces of content data are recorded and alead-out area that is formed on an outer periphery side of the recordingarea, the other copyright management information is recorded in therecording area, a position of said data recording area providing lowersecrecy than any one of said lead-in area and said lead-out area, andthe first copyright management information and the second copyrightmanagement information are not related to encryption of the contentdata.
 15. The recording method as set forth in claim 14, wherein thefirst copyright management information and the second copyrightmanagement information are copyright management information that aredifferent from each other in management conditions under which theplurality of pieces of content data are reproduced.
 16. The recordingmethod as set forth in claim 15, wherein any one of the first copyrightmanagement information and the second copyright management informationis management information that represents reproduction permissions ofthe plurality of pieces of content data, whereas the other copyrightmanagement information is management information that represents partialreproduction permissions of the plurality of pieces of content data. 17.The recording method as set forth in claim 14, wherein any one of thefirst copyright management information and the second copyrightmanagement information is stricter in management conditions of theplurality of pieces of content data than the other copyright managementinformation.
 18. The recording method as set forth in claim 14, whereinany one of the first copyright management information and the secondcopyright management information is stricter in reproduction restrictionconditions of the plurality of pieces of content data than the othercopyright management information.
 19. The recording method as set forthin claim 18, wherein any one of the first copyright managementinformation and the second copyright management information containscopy prohibition conditions of the plurality of pieces of content data,whereas the other copyright management information contains copypermission conditions of the plurality of pieces of content data. 20.The recording method as set forth in claim 19, wherein the othercopyright management information, which contains the copy permissionconditions of the plurality of pieces of content data, is recorded in atleast any one of the lead-in area and the lead-out area.
 21. Therecording method as set forth in claim 19, wherein one of the firstcopyright management information and the second copyright managementinformation, which contains the copy prohibition conditions of theplurality of pieces of content data, is recorded in the data recordingarea.
 22. The recording method as set forth in claim 14, wherein atleast one of the plurality of pieces of content data is encrypted andrecorded, and wherein the first copyright management information and thesecond copyright management information are recorded along with key datawith which the encrypted at least one of the plurality of pieces ofcontent data is decrypted.
 23. The recording method as set forth inclaim 22, wherein the first copyright management information and thesecond copyright management information are encrypted and recorded alongwith the key data with which the encrypted at least one of the pluralityof pieces of content data is decrypted.
 24. The recording method as setforth in claim 14, further comprising: recording data with respect tosoftware for reading the other copyright management information in therecording area, in which the plurality of pieces of content data arerecorded.
 25. The recording method as set forth in claim 14, wherein theother copyright management information is used by a reproduction devicewhen the reproduction device is not capable of reading the lead-in area,or the lead-out area, of the recording medium.
 26. A recording mediumrecording apparatus, comprising: a head portion for recording data to arecording medium; an encode processing portion for performing anencoding process for data to be recorded and supplying the encoded datato the head portion; and a controlling portion for recording a pluralityof pieces of content data to the recording medium and controlling thehead portion so that it records first copyright management informationand second copyright management information with which copyrights of theplurality of pieces of content data are managed to different positionsof the recording medium, the secrecies of the different positions beingdifferent from each other, wherein the controlling portion is configuredto perform a control so that one of the first copyright managementinformation and the second copyright management information is recordedin at least any one of a lead-in area that is formed on an innerperiphery side of a data recording area in which the plurality of piecesof content data are recorded and a lead-out area that is formed on anouter periphery side of the recording area, the controlling portion isconfigured to perform a control so that the other copyright managementinformation is recorded in the recording area, a position of said datarecording area providing lower secrecy than any one of said lead-in areaand said lead-out area, and the first copyright management informationand the second copyright management information are not related toencryption of the content data.
 27. The recording medium recordingapparatus as set forth in claim 26, wherein the first copyrightmanagement information and the second copyright management informationare copyright management information that are different from each otherin management conditions under which the plurality of pieces of contentdata are reproduced.
 28. The recording medium recording apparatus as setforth in claim 27, wherein any one of the first copyright managementinformation and the second copyright management information ismanagement information that represents reproduction permissions of theplurality of pieces of content data, whereas the other copyrightmanagement information is management information that represents partialreproduction permissions of the plurality of pieces of content data. 29.The recording medium recording apparatus as set forth in claim 26,wherein any one of the first copyright management information and thesecond copyright management information is stricter in managementconditions of the plurality of pieces of content data than the othercopyright management information.
 30. The recording medium recordingapparatus as set forth in claim 26, wherein any one of the firstcopyright management information and the second copyright managementinformation is stricter in reproduction restriction conditions of theplurality of pieces of content data than the other copyright managementinformation.
 31. The recording medium recording apparatus as set forthin claim 30, wherein any one of the first copyright managementinformation and the second copyright management information containscopy prohibition conditions of the plurality of pieces of content data,whereas the other copyright management information contains copypermission conditions of the plurality of pieces of content data. 32.The recording medium recording apparatus as set forth in claim 31,wherein the other copyright management information, which contains thecopy permission conditions of the plurality of pieces of content data,is recorded in at least any one of the lead-in area and the lead-outarea.
 33. The recording medium recording apparatus as set forth in claim31, wherein one of the first copyright management information and thesecond copyright management information, which contains the copyprohibition conditions of the plurality of pieces of content data, isrecorded in the data recording area.
 34. The recording medium recordingapparatus as set forth in claim 26, wherein the controlling portion isconfigured to encrypt and record at least one of the plurality of piecesof content data and record the first copyright management informationand the second copyright management information along with key data withwhich the encrypted at least one of the plurality of pieces of contentdata is decrypted.
 35. The recording medium recording apparatus as setforth in claim 34, wherein the controlling portion is configured toencrypt and record the first copyright management information and thesecond copyright management information along with the key data withwhich the encrypted at least one of the plurality of pieces of contentdata is decrypted.
 36. The recording medium recording apparatus as setforth in claim 26, wherein the other copyright management information isused by a reproduction device when the reproduction device is notcapable of reading the lead-in area, or the lead-out area, of therecording medium.
 37. A recording medium reproducing method, comprisingthe steps of: reading any one of first copyright management informationand second copyright management information from a recording mediumcomprising a lead-in area, a data recording area that is formed on anouter periphery side of the lead-in area and in which a plurality ofpieces of content data is recorded, and a lead-out area formed on anouter periphery side of the data recording area, wherein the firstcopyright management information and the second copyright managementinformation with which copyrights of the plurality of pieces of contentdata are managed are recorded at different positions whose secrecies aredifferent from each other; and controlling at least a reproducingoperation for content data that is read from the data recording areacorresponding to the copyright management information that has beenread, wherein any one of the first copyright management information andthe second copyright management information is recorded in any one ofthe lead-in area and the lead-out area, the other copyright managementinformation being recorded in the data recording area, a position ofsaid data recording area providing lower secrecy than any one of saidlead-in area and said lead-out area, and the first copyright managementinformation and the second copyright management information are notrelated to encryption of the content data.
 38. The recording mediumreproducing method as set forth in claim 37, further comprising: whereindata with respect to software for reading the other copyright managementinformation is recorded on the recording medium, and reading the othercopyright management information, after the data with respect to thesoftware is read.
 39. The recording medium reproducing method as setforth in claim 37, wherein the first copyright management informationand the second copyright management information are copyright managementinformation that are different from each other in management conditionsunder which the plurality of pieces of content data are reproduced. 40.The recording medium reproducing method as set forth in claim 39,wherein any one of the first copyright management information and thesecond copyright management information is management information thatrepresents reproduction permissions of the plurality of pieces ofcontent data, whereas the other copyright management information ismanagement information that represents partial reproduction permissionsof the plurality of pieces of content data.
 41. The recording mediumreproducing method as set forth in claim 40, wherein one of the firstcopyright management information and the second copyright managementinformation is recorded in at least any one of the lead-in area and thelead-out area.
 42. The recording medium reproducing method as set forthin claim 41, wherein the other copyright management information of thefirst copyright management information and the second copyrightmanagement information is recorded in the data recording area.
 43. Therecording medium reproducing method as set forth in claim 37, whereinany one of the first copyright management information and the secondcopyright management information is stricter in management conditions ofthe plurality of pieces of content data than the other copyrightmanagement information.
 44. The recording medium reproducing method asset forth in claim 37, wherein any one of the first copyright managementinformation and the second copyright management information is stricterin reproduction restriction conditions of the plurality of pieces ofcontent data than the other copyright management information.
 45. Therecording medium reproducing method as set forth in claim 37, furthercomprising: wherein at least one of the plurality of pieces of contentdata recorded in the data recording area has been encrypted andrecorded, wherein the first copyright management information and thesecond copyright management information along with key data with whichthe encrypted at least one of the plurality of pieces of the contentdata is decrypted, and decrypting the encrypted data with the key dataread from the recording medium.
 46. The recording medium reproducingmethod as set forth in claim 45, further comprising: wherein the firstcopyright management information and the second copyright managementinformation have been encrypted and recorded along with the key datawith which the encrypted at least one of the plurality of pieces ofcontent data is decrypted, wherein another key data with which encrypteddata is decrypted has been recorded on the recording medium, anddecrypting, with at least the other key data read from the recordingmedium, the first copyright management information, the second copyrightmanagement information, and the key data.
 47. The recording mediumreproducing method as set forth in claim 37, wherein the other copyrightmanagement information is used by a reproduction device when thereproduction device is not capable of reading the lead-in area, or thelead-out area, of the recording medium.